--- a/mercurial/changelog.py	Tue Sep 15 10:49:50 2020 +0200
+++ b/mercurial/changelog.py	Tue Sep 15 10:55:30 2020 +0200
@@ -319,6 +319,8 @@
 
     @property
     def files(self):
+        if self._cpsd:
+            return sorted(self.changes.touched)
         off = self._offsets
         if off[2] == off[3]:
             return []